GCN Circular 33540
Subject
GRB 230328B: Nanshan/NEXT 2nd optical observation
Date
2023-03-30T01:53:10Z (a year ago)
From
Dong Xu at NAOC/CAS <dxu@nao.cas.cn>
T.H. Lu, S.Q. Jiang, S.Y. Fu, X. Liu (NAOC), Z.P. Zhu (NAOC, HUST), D.
Xu (NAOC), X. Gao (Urumqi No.1 Senior High School), J.Z. Liu (XAO) report:
We observed the field of GRB 230328B detected by Swift (Gropp et al.,
GCN 33527) using the NEXT-0.6m telescope located at Nanshan, Xinjiang,
China. We obtained 12x300 s frames in the Sloan r-band, starting at
14:49:11 UT on 2023-03-29 (i.e., 23.9 hr after the BAT trigger).
The optical afterglow (e.g., Pankov et al., GCN 33528; Belkin et al.,
GCN 33530; Lu et al., GCN 33534; Catapano et al., GCN 33535; Suresh et
al., GCN 33536; Adami et al., GCN 33537; Gompertz et al., GCN 33538;
Komesh et al., GCN 33539) is not detected in our stacked image.
Preliminary photometric result is as follows:
T_mid-T0 (hr) Filter Upper limit(3-sigma)
24.42 r >21.0
calibrated with the nearby PanSTARRS field and not corrected for
Galactic extinction.